Laboratory Investigation on Wave Reflection from Caisson Marine Wall  Fulltext 

[ Ali Karami Khaniki ] - Associated Professor and Head, Dept. of Coastal Protection, SCWMRI P.O. Box: 13445-1136, Tehran, Iran.
[ Moloud Shekarlab ] - Postgraduate Student, Dept. of Physical Oceanography Islamic Azad University North Tehran Branch

خلاصه مقاله:

Wave reflection is one of important parameters in design of a marine wall. Higher amount of
reflection from a marine wall increases the wave height at the front of wall and therefore the
necessary height of the wall to prevent overtopping and the cost of the project. To reduce the
wave reflection from a marine wall, special shapes of the wall facing should be used. One of
the most efficient types, which seriously dissipates wave energy and reduces the wave
reflection, is caisson wall. The amount of wave absorption by the caisson wall is dependent to
wave characteristics such as height and period and the porosity and the dimensions of holes in
the caisson units. This paper evaluates the wave reflection coefficient from caisson walls with
different porosity (different dimensions and layout for caisson blocks). This study was done
by using some experimental tests on a small-scale model walls with different amounts of
porosity. The results from the tests clearly show a relationship between wave reflection
coefficient and the wall porosity and the wave parameters. In some cases the wave reflection
reduced by fifty percent relative to smooth wall facing.

marine wall, wave reflection, caisson wall, reflection coefficient, coastal structures